| 摘要 |
PROBLEM TO BE SOLVED: To save labor in apparatus maintenance while maintaining measurement accuracy by reducing a replenishing amount of an internal liquid in the long term use of a measurement device using a reference electrode.SOLUTION: A reference electrode 6 comprises: a second internal liquid chamber 36 having a charged second internal liquid 15; a second body 42 formed so that the second internal liquid 15 is contacted with a measuring liquid 9 to be measured flowing thereon through a liquid junction 40 provided in an upper end portion 38 of the second internal liquid chamber 36; and an internal pole R arranged to be extended upward from a lower end portion 44 of the second internal liquid chamber 36. A replenishing port 17 for replenishing the second internal liquid chamber 36 with the second internal liquid 15 is provided below an upper end portion 46 of the internal pole R. |
